Thanks for the response SS...I have been lurking on this site for a while now and it has been helpful with accessorizing my HHR. I was hoping that I would be joining for information unrelated to mechanical issues...ah, well.
I have been reading that chevy did produce hydraulic or fluid filled motor mounts for particular vehicles and they tended to put them more in manual transmission cars, which is what I have. I have attached a link to an old article...
A part of that article states the following...
..."the Ecotec engine has twin balance shafts in the oil pan to reduce medium- to high-rpm shaking forces. Although these are heavier than those in the 2.2 Four, the 2006 oil pan itself is the same as the one on the earlier engine. Both bolt to the lower part of the transmission case to produce a more rigid powertrain.
The accessories are direct-mounted to reduce vibration, and there are hydraulic engine mounts designed to absorb much of whatever vibration is emitted."
Proof enough for me.